hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tue, 31 Jul 2012 23:42:27 +0000 (16:42 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 1 Aug 2012 01:42:41 +0000 (18:42 -0700)
commit8e6ac7fab374816de9a8b0a8fbb02ef761a30ff4
tree94439bfcceb9e11af842da63f18f608aff4919c4
parentabb8206cb07734d0b7bf033c715995d6371a94c3
hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration

With HugeTLB pages, hugetlb cgroup is uncharged in compound page
destructor.  Since we are holding a hugepage reference, we can be sure
that old page won't get uncharged till the last put_page().

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/hugetlb_cgroup.h
mm/hugetlb_cgroup.c
mm/migrate.c